@article{1103841117,
author = {Billard, P. and Fano, G.},
title = {An existence proof for the gap equation in the superconductivity theory},
journal = {Comm. Math. Phys.},
volume = {7},
number = {1},
year = {1968},
pages = { 274-279},
language = {en},
url = {http://dml.mathdoc.fr/item/1103841117}
}
Billard, P.; Fano, G. An existence proof for the gap equation in the superconductivity theory. Comm. Math. Phys., Tome 7 (1968) no. 1, pp. 274-279. http://gdmltest.u-ga.fr/item/1103841117/